Microchip PIC

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Cautions

Config

  • NEVER disable the PIC's /MCLR (Reset) pin function
  • NEVER program a PIC "in circuit" with ANY other connections to the target board

Circuit Design

  • ALWAYS set MCLRE_ON in the config options and have MCLR pin with a 10K pull-up resistor to Vdd.

Initialization

  • ALWAYS set the input pins and clear the output pins, excepting UART TX/RX.
i.e. SDO should have TRISX bit cleared, SDI should have TRISX bit set.

Configuration Fuses

MPLAB 8.x

__CONFIG(1,HS&CPUDIV1) ;  //use external crystal 4M
__CONFIG(2,WDTDIS) ;      //wtd off
__CONFIG(3,PBADDIS) ;     //Configure PORTB<4:0> pins as digital
__CONFIG(4,XINSTDIS) ;

MPLAB X v2.35

#pragma config PLLDIV = 1
#pragma config CPUDIV = OSC1_PLL2
#pragma config FOSC = HS
#pragma config WDT = OFF
#pragma config PBADEN = OFF
#pragma config XINST = OFF

SDK/IDEs

  • mpide: Arduino like IDE for ChipKit & Fubarino
http://chipkit.s3.amazonaws.com/index.html